Final answer:
Cabeza de Vaca's detailed descriptions of suffering effectively evoke empathy and sympathy, enhancing the emotional impact and effectiveness of his account.
Step-by-step explanation:
Cabeza de Vaca's descriptions of the suffering experienced by him and his men add to the effectiveness and emotional impact of his account by creating a deep sense of empathy and sympathy among readers. When an account includes personal and poignant details of hardship, it allows readers to imagine themselves in similar dire circumstances, thus connecting them emotionally to the narrative. These vivid descriptions serve not just as a record of events but also as a powerful tool to elicit an emotional response, which can make the historical narrative more compelling and memorable.